GREEN M. A. Jadoon Internet-Draft S. Robitzsch Intended status: Standards Track InterDigital Europe Expires: 8 January 2026 7 July 2025 A YANG Data Model for Reporting Utilization Scores in ISAC draft-jadoon-green-isac-utilization-00 Abstract This document defines a basic YANG data model to report sensing measurements utilization score (US) in Integrated Sensing and Communication (ISAC) systems. The score quantifies the resource impact of different sensing measurements, including compute, memory, storage, energy, and latency. The model supports per-measurement telemetry reporting. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. 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Jadoon & Robitzsch Expires 8 January 2026 [Page 1] Internet-Draft ISAC-Utilization July 2025 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Model Scope . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2 4. YANG Module . . . . . . . . . . . . . . . . . . . . . . . . . 3 4.1. JSON Encoding Example . . . . . . . . . . . . . . . . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . 5 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5 8. Normative References . . . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6 1. Introduction ISAC introduces a paradigm where network nodes perform both communication and sensing tasks. Several use cases and their requirements for ISAC have been defined in 3GPP [TR22.837] and ETSI[GR-ISC001]. A sensing task involves measurements of parameters such as Doppler, angle of arrival (AoA), and radar cross section (RCS), micro-doppler, range/delay [Jadoon2025] etc., each consumes varying amounts of system resources such as memory, energy, storage. To enable energy-efficient orchestration, it is important to measure and report the utilization impact of each measurement for a sensing task. This draft proposes a YANG data model that allows ISAC-enabled devices to report an SMUS per sensing task, computed from weighted metrics such as CPU usage, memory, energy draw, storage load, and latency. 2. Model Scope The model is intended for systems that support ISAC and want to participate in energy-aware operations. 3. Tree Diagram Jadoon & Robitzsch Expires 8 January 2026 [Page 2] Internet-Draft ISAC-Utilization July 2025 module: ietf-isac-utilization +--ro sensing-utilization +--ro function-score* [function] +--ro function sensing-function +--ro score-components | +--ro compute-score? decimal64 | +--ro memory-score? decimal64 | +--ro energy-score? decimal64 | +--ro storage-score? decimal64 | +--ro latency-score? decimal64 +--ro weights | +--ro compute-weight? decimal64 | +--ro memory-weight? decimal64 | +--ro energy-weight? decimal64 | +--ro storage-weight? decimal64 | +--ro latency-weight? decimal64 +--ro total-utilization-score? uint8 4. YANG Module module ietf-isac-utilization { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-isac-utilization"; prefix isac-util; organization "InterDigital Europe"; contact "Muhammad Awais Jadoon "; description "YANG data model for reporting ISAC sensing resource utilization scores."; revision "2025-06-28" { description "Initial version."; } typedef sensing-function { type enumeration { enum delay { description "Time delay measurement representing target range."; } enum doppler { description "Doppler shift measurement representing target velocity."; } enum micro-doppler { description "Micro-Doppler analysis for fine-grained motion of target."; } enum aoa { description "Angle of Arrival estimation."; Jadoon & Robitzsch Expires 8 January 2026 [Page 3] Internet-Draft ISAC-Utilization July 2025 } enum rcs { description "Radar Cross Section estimation."; } } description "Enumerates supported sensing measurement functions within ISAC systems."; } container sensing-utilization { config false; list function-score { key "function"; leaf function { type sensing-function; } container score-components { leaf compute-score { type decimal64 { fraction-digits 2; } units "%"; } leaf memory-score { type decimal64 { fraction-digits 2; } units "%"; } leaf energy-score { type decimal64 { fraction-digits 2; } units "%"; } leaf storage-score { type decimal64 { fraction-digits 2; } units "%"; } leaf latency-score { type decimal64 { fraction-digits 2; } units "%"; } } container weights { leaf compute-weight { type decimal64 { fraction-digits 2; } units "ratio"; } leaf memory-weight { type decimal64 { fraction-digits 2; } units "ratio"; } leaf energy-weight { type decimal64 { fraction-digits 2; } units "ratio"; } leaf storage-weight { type decimal64 { fraction-digits 2; } units "ratio"; } leaf latency-weight { type decimal64 { fraction-digits 2; } units "ratio"; } } leaf total-utilization-score { type uint8; description "Composite score (0–100) aggregating all measurements."; } } } } Note: The sensing measurement types defined in this document (e.g., Delay, Doppler, micro-Doppler, AoA, RCS) is not exhaustive. The YANG model is extensible, and additional sensing measurments may be incorporated as the standards develop. 4.1. JSON Encoding Example Jadoon & Robitzsch Expires 8 January 2026 [Page 4] Internet-Draft ISAC-Utilization July 2025 { "ietf-isac-utilization:sensing-utilization": { "function-score": [ { "function": "micro-doppler", "score-components": { "compute-score": 82.0, "memory-score": 60.0, "energy-score": 75.0, "storage-score": 50.0, "latency-score": 45.0 }, "weights": { "compute-weight": 0.3, "memory-weight": 0.2, "energy-weight": 0.3, "storage-weight": 0.1, "latency-weight": 0.1 }, "total-utilization-score": 70 } ] } } 5. Security Considerations TBD 6. IANA Considerations TBD 7. Acknowledgements This work has received funding from the Smart Networks and Services Joint Undertaking (SNS JU) under the European Union's Horizon Europe research and innovation programme under Grant Agreement No 101192521 (MultiX). 8. Normative References [GR-ISC001] ETSI, "Integrated Sensing And Communications (ISAC); Use Cases and Deployment Scenarios", ETSI GR ISC001 V1.1.1 , 2025. Jadoon & Robitzsch Expires 8 January 2026 [Page 5] Internet-Draft ISAC-Utilization July 2025 [Jadoon2025] Jadoon, M. A., Robitzsch, S., and F. Conceição, "Dynamic and Resource-Efficient ISAC Operations in Sensing-Enabled 6G Systems", Accepted, to appear in IEEE ICC 2025 , 2025. [TR22.837] 3GPP, "Study on Integrated Sensing and Communication (ISAC)", 3GPP TR 22.837 V19.4.0 , 2024. Authors' Addresses Muhammad Awais Jadoon InterDigital Europe United Kingdom Email: muhammad.awaisjadoon@interdigital.com Sebastian Robitzsch InterDigital Europe United Kingdom Email: Sebastian.Robitzsch@InterDigital.com Jadoon & Robitzsch Expires 8 January 2026 [Page 6]